You know what my favourite snack is?
Souls!

You know what makes them taste better?
Frustration!

You know what I'm going to do so that your soul is the most delicious treat when I decide to get my claws into you?

That's right I'm going to keep you in chastity and night after night you'll become more and more frustrated that there'll be no release for you, and I will keep coming back until you're ready and willing to damn your soul to eternal torment and suffering yourself (see even demons practice good consent!) just to get some relief!